Max ams



(No'ModeL) M; AMS.

SHEET METAL CAN. No. 570,591. Patented Nov.3, 1896.

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UNITED STATES PATENT OFFICE.

MAX AMS, on NEW YORK, N. Y.

SHEET-METAL'CAN.

SPECIFICATION forming part of Letters Patent No. 570,591, dated November 3, 1896.

Application filed July 28, 1896. Serial No. 600,738. (No model.)

To all whom, it may concern:

Beitknown that I, MAX Arm, of New York city, New York, have invented an Improved Sheet-Metal Can, of which the'following is a specification.

This invention relates to a sheet-metal can designed for packing food products, and more particularly to an improved construction of the seam between the can-body and the cover.

In the accompanying drawings, Figure 1 is a perspective view of the cover; Fig. 2, a longitudinal section thereof; Fig. 3, a similar section through the can-body. Figs. 4, 5, 6, and 7 are sections through the joint, showing it in successive stages of completion.

The letter a represents the body of asheetmetal can, flanged at its upper end, as at a. The sheet-metal cover I) is countersunk or depressed at its center, so as to be provided with an upright neck or shoulder b, which is adapted to fit snugly Within the opening of the can-body. Around this neck the cover is provided with the laterally-extending flange If, which-should be considerably wider than the flange a. After the coverhas been pressed into the above-described form its neck I) and flange b are covered with an airexcluding adhesive body 0, that adheres to the cover and constitutes ineffect a packing. This coating consists of a layer of rubber cement d, Fig. 1, which may be applied to the parts b b with a brush, and of a thin layer of asbestos pulp e, which forms a film on the surface of the cement.

When the can is to be sealed, the cover, prepared as described, is placed upon the chime so that its countersunk central section projects into the can-body, Fig. 4:. The projecting part of the flange b is next crimped downward, Fig. 5, then inward, Fig. 6, and 40 then the two flanges are jointly bent downward to produce a lap-joint, Fig. 7, when the operation is completed.

It will be seen that with my improvement a perfectly-tight joint is produced without th e useof-solflerorwashers. or sealing body does not only extend into every portion of the lap-joint, but it also extends between the inner surface of the canbody and the neck I) of the cover. To this feature I attach considerable importance, because it insures a tight seating of the cover and a tight packing independent of the lapjoint.

The rubber in my improved packing forms the air-excluding body proper, while the asbestos forms a coating or skin upon the surface of the same which greatly increases the tightness of the joint. Thus a packing of superior merit is produced, and, moreover, the resistance ofiered by the ordinary washers to the crimping operation and the consequent frequent imperfections of the seam are entirely avoided.

What I claim is- The combination of a sheet-metal can with a flanged and countersunk cover and with an adhesive coating secured to the cover, and consisting of rubber cement and an asbestos film, substantially as and for the purpose specified.

MAX AMS.

Witnesses F. v. BRIEsEN, WILLIE MILLER.

Theming 

